[n] a person who helps people or institutions
[n] a person who contributes to the fulfillment of a need or furtherance of an effort or purpose; "my invaluable assistant"; "they hired additional help to finish the work"
accommodator, accomplice, acolyte, actor's assistant, aide, attendant, attender, auxiliary, benefactress, bondsman, bondswoman, cat's-paw, chief assistant, coadjutor, confederate, deliverer, dental assistant, deputy, do-gooder, donor, dresser, enforcer, event planner, facilitator, fashion model, girl Friday, giver, good person, good Samaritan, hatchet man, humanitarian, improver, instrument, labor coach, liberator, lieutenant, man Friday, manakin, manikin, mannequin, mannikin, model, monitrice, obliger, offerer, offeror, paraprofessional, patron, pawn, poser, powder monkey, presenter, prompter, provider, rescuer, right-hand man, Samaritan, savior, saviour, secretarial assistant, secretary, sidesman, sparer, sponsor, supporter, tender, theater prompter, uncle, water boy, waterer, whipper-in, worker
\Help"er\, n. One who, or that which, helps, aids, assists, or relieves; as, a lay helper in a parish. Thou art the helper of the fatherless. --Ps. x. 1
4. Compassion . . . oftentimes a helper of evils. --Dr. H. More.